1. Product Overview
The Rgthuhu Military Smart Watch is a rugged and versatile tactical smartwatch designed for men, compatible with both Android and iPhone devices. It features 10 ATM waterproofing, advanced health monitoring capabilities including blood pressure, heart rate, and sleep tracking, and allows for answering and making calls directly from your wrist. Built to withstand tough conditions, this fitness tracker is an ideal companion for outdoor sports and daily activities.

Figure 1.1: Front view of the Rgthuhu Military Smart Watch.
2. What's in the Box
- 1*military smartwatch
- 1*black band
- 1*camouflage band
- 1*USB charger
- 1*manual
3. Setup Guide
3.1 Initial Activation and Charging
Upon receiving your new smartwatch, please charge it first to activate the device. Ensure the watch is fully charged before its first use to optimize battery performance. The watch features a 380mAh battery that fully charges in approximately 2 hours.

Figure 3.1: Battery life and charging details.
3.2 App Download and Connection
To utilize all features of your smartwatch, you need to connect it to the "Da Fit" APP. You can download the app by scanning the QR code provided in the manual or searching for "Da Fit" in your smartphone's app store. The sport smart watch is compatible with most smartphones with Android system 6.0 & iOS 9.0 or above.
Video 3.1: Instructions on how to connect your smartwatch to the companion app.
3.3 Bluetooth Pairing
Once the Da Fit app is installed, open it and follow the on-screen instructions to pair your smartwatch via Bluetooth. This connection enables features like phone calls, message notifications, and data synchronization.
Video 3.2: Demonstration of the smartwatch's features, including Bluetooth calling and text notifications.
4. Operating Instructions
4.1 Basic Navigation
The smartwatch features a 1.9-inch HD LCD large screen for clear and colorful details. Navigate through menus and functions by swiping across the screen and using the physical buttons on the side. The "POWER" button typically powers the device on/off and acts as a back button, while the "SPORT" button provides quick access to sports modes.

Figure 4.1: Overview of smartwatch display and controls.
4.2 Communication Features
With its single-mode Bluetooth processor, the smartwatch allows you to make and answer phone calls directly from your wrist. The built-in high-fidelity speakers ensure clear sound. You can also receive message reminders from various apps like Facebook, Twitter, Skype, WhatsApp, Instagram, and SMS.

Figure 4.2: Bluetooth calling and message alert features.
4.3 Smart Tools
The smartwatch is equipped with 128M memory, supporting various application tools for convenience:
- Music Control: Manage music playback on your phone.
- Camera Control: Use your watch as a remote shutter for your phone's camera.
- Calculator: Perform basic calculations.
- Voice Control: Utilize voice commands for various functions.
- Weather Forecast: Get real-time weather updates synced from your phone.
- Alarm Clock & Timer: Set alarms and use timer functions.
- Sedentary Reminder & Drink Water Reminder: Stay active and hydrated with timely alerts.

Figure 4.3: Smart tools available on the watch.
4.4 Custom Watch Faces
Personalize your smartwatch with over 200 watch faces available through the Da Fit App. You can also create DIY watch faces using your own photos.

Figure 4.4: Customization options for watch faces.
5. Health Monitoring
The Rgthuhu smartwatch is equipped with high-precision sensors to monitor key health metrics. NOTE: Smartwatch health data cannot be used for medical purposes (not to be compared with medical devices) and is for exercise reference only.
5.1 Heart Rate, Blood Pressure, and Blood Oxygen (SpO2)
Continuously monitor your heart rate, blood pressure, and blood oxygen levels. These features provide valuable insights into your physical condition, making exercise safer and more controllable.

Figure 5.1: 24/7 Health Monitoring features.
5.2 Sleep Monitoring
The smartwatch tracks and assesses your sleep across various dimensions, including deep sleep, light sleep, and REM stages. It provides a score on your overall sleep quality to help you understand and improve your sleep habits.

Figure 5.2: Sleep monitoring and analysis.
5.3 Activity Tracking and Sports Modes
With support for over 120 sports modes, the pedometer smart watch accurately tracks your calories burned, steps taken, and distance covered. Easily customize and change your routine to suit your fitness goals.

Figure 5.3: Intelligent recognition of 120+ sports modes.

Figure 5.4: Smart measurement of your movement.
6. Durability and Water Resistance
The tactical smart watch is built with a micro-blasted metal frame and titanium body, having passed 12 military-grade tests for resistance against vibration, drops, and car-crushing. Its high-strength tempered glass is scratch and wear-resistant. With an IP69K rating and static waterproof capability up to 100m, you can confidently wear it for various water sports and activities like swimming, diving, and surfing.

Figure 6.1: Rugged outdoor military smartwatch features.

Figure 6.2: 10ATM Waterproof for water sports.
7. Maintenance
7.1 Cleaning
Regularly clean your smartwatch and band with a soft, damp cloth. Avoid using harsh chemicals or abrasive materials that could damage the device or its sensors.
7.2 Charging Best Practices
To prolong battery life, avoid fully discharging the watch frequently. Charge it when the battery level is low, and disconnect it once fully charged. The 380mAh battery provides approximately 10 days of high-intensity use, 15 days of daily use, and 50 days of standby time.
8. Troubleshooting
8.1 Connection Issues
If your watch is not connecting to the "Da Fit" APP, ensure Bluetooth is enabled on your phone and the watch. Try restarting both devices and re-pairing them through the app. If problems persist, contact customer support.
8.2 Health Data Accuracy
Remember that smartwatch health data is for exercise reference only and should not be used for medical purposes. Factors like skin tone, movement, and proper fit can affect sensor readings. For medical concerns, consult a healthcare professional.
8.3 Screen Visibility in Bright Sunlight
In extremely bright conditions, the screen visibility might be reduced. Adjust the screen brightness settings on the watch or seek shaded areas for better viewing.
9. Specifications
| Feature | Specification |
|---|---|
| Model Name | Military Smart Watch |
| Brand | Rgthuhu |
| Screen Size | 1.9 inches |
| Shape | Square |
| GPS | GPS Via Smartphone |
| Battery Cell Composition | Lithium Polymer |
| Wireless Communication Standard | Bluetooth |
| Connectivity Technology | Bluetooth |
| Operating System Compatibility | Android 6.0 & iOS 9.0 or above |
| Item Weight | 0.3 Pounds (4.8 ounces) |
| Product Dimensions | 10.39 x 1.65 x 0.5 inches |
| Water Resistance | 10 ATM (static waterproof to 100m), IP69K rating |
| Special Features | Calculator, Custom Watch Faces, Stopwatch, Camera Control, Music Control and Playback, Timer, Alarm Clock, Find Phone, SMS Reminder, Voice Assistant, Make/Answer Calls, Call Records, Contacts, Weather Forecast, Women's Health, Sedentary Reminder, Drinking Water Reminder, Heart Rate Monitor, Blood Pressure and Blood Oxygen Monitor, Sleep Monitor, 120+ Sports Tracker, Calorie Tracker |

Figure 9.1: Product dimensions.
10. Warranty and Support
For any issues or inquiries regarding your Rgthuhu Military Smart Watch, please refer to the contact information provided in your product packaging or reach out to the seller directly for assistance. They will be able to provide support and information regarding any applicable warranty.